Furnace arch for boilers



Aug. 26, 1924.

c. A. STRACHOTA FURNACE ARCH FOR BOILERS Filed May 1'2 0 1922 2 Sheets-Sheet 1 Aug. 26, 1924.

. C. STRACHOTA FURNACE ARCH FOR BOILERS Filed May 12, 1 2 2 sheets -sheet. b

Patented Aug. 2d, 1924.

FURNACE ARCH FOR BOILER;S.

Application filed may 12,

To all whom it may concern:

Be it known that I, CLARENCE A. STnA- CHOTA, a citizen of the United States, residing at St. Paul, in the county of Ramseyand State of Minnesota, have invented certain new and useful Improvements in Furnace Arches for Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present' invention relates to furnace arches such as used in connection with boilers in steam-generating plants and in steel plants, in lass factories and various other places, antfis particularly directed to the improvement of what is known as single fire arches or arches wherein there is but one block hung in a vertical direction from the metallic overhead support. Generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

The invention is directed chiefly to simplilied and improved means for detachably hanging the blocks from the supporting beams in such a manner that any defaced arch. blockmay be dropped out of position and a new block substituted therefor without disturbing the other blocks of the arch. However, the invention involves certain other novel features, as will hereinafter appear.

In the accompanying drawings, which illustrate the invention, like characters in:

-dieate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a vertical section showing an arch embodying my invention and associating with an apron wall, some parts being broken away;

Fig. 2 is a transverse vertical section taken on the line 22 of Fig. 1;

Fig. 3 is a perspective showing one of the radial or wedge-shaped blocks of the arch;

1 Fig. 4 is a detail in perspective showing one of the block hangers;

Fig. 5 is a perspective showing a shelfforming plate and its hanger bracket or head removed from working position;

Fig. 6 is a perspective showing the shelfforrning plate of Fig. 5 removed from its hanger bracket;

Fig. 7 is a view corresponding to Fig. 2,

1922. serial no. 560,33 but illustrating a modified form of the block hanger;

Fig. 8' is a perspective showing one of the main arch-forming blocks of the type used in Figs 1, 2 and 7;

Fig. 9 is a perspective showing one of the block hangers of the structure illustrated in Fig. 7 and p Fig. 10 is an ele t'ation showing a modified form of beam hanger.

The fire arch is supported from transverse main beams 10 and lLwhic'h beams are preferably I-loearns, the ends of which will be anchored in the side Walls of the furnace. in practice, there will be another li-beam 10, at the left in respect to Fig. 1, to support that portion of the arch that is broken away in said view. Slidabiy hung on the lower flanges of the beams 10 and 1.1 are beam hangers 12 having inturned laterally spaced fulcrum lugs 13. The beam hangers 1.2 are aligned on the main supporting beams, so that their lugs 13 will enga e short upper flanges 14 and 14, respective? on laterally spaced secondary arch-supporting beams l5 and detachable beam tips 16. The above described arrangements of beams and beam tips are found in the commercial furnace arch known as the Liptak arch and are not herein broadly claimed. The supplemental be'ams 15, at their lower edges, have longitudinally extended flanges 17, while thebea'm tips or detachable sections 16 are provided with similar lower edge flanges 18 that are curved upwardly at 18 through approximately ninety degrees.

Mounted to slide on the beam flanges 17,

' 18-18 are metallic block hangers, the pre ferred form of which is illustrated in Figs. 1,; 2 and 4. These block. hangers, as there shown, are in the form of flat elongated metal loops 19 slotted at 20 and having outwardly projecting lies 2].. These hangers are adapted to freely slide on the above noted beam flanges 17, 1818 The main body of the arch is made up of highly refractory blocks 22 and-theupwardly curved or radial end portion of the arch is made up of blocks 23 of similar construction, except that they are made wedgeshaped to form the se ments of a circle or similar curve. Intheir upper ends, the blocks 22 and 23 are formed with seats that adapt them to be interlocked to and hung upon the co-operating block hangers 19. As

pseieza'oly designed and. lllLlSeI'fii-Ql, seitl loclzs 22 and in their tops, are formed with channels M, the sides of "which are unclercutet to. form seats to receive the projecting lips 21 of'the block hangers. The ledges 26 that overhang the seats 25, at one side of the block, are cutaway or cut back M2? to afford ve rticel clemance for the lips 21. This general or "eugeineiit is "important in because it not only permits any one of the blocks 23 to be removed Without listurhing the ocljacent block, but it permits this to he clone Without moving the clock hanger 19 of the removed block into an ed- 3 jocent clock. When ov block is to be placed in position, it is forced upward to the proper place and then the metallic hanger 19 is slid under the ledges Q6 and into the seats 25, in which positions they will support the blocks 20 from the beams. When a block is to be removed, it is only necessary to sliele the block hanger 1.9 thereof into the clearance spaces 53'? of that block, and thereupon, the said block may be dropped out of the arch. It will thus be seen. that each block anti its hanger operates as on independent unit,

' mieptin any block or a'cv desired number i hloi which may have heen hiirneri away or rleimugeol, to he dropped, from the arch reori permitting another block or blocks to be subst'iuitmi therefor, Without disturbing h Sc blocks that do not require replacement. 'l. humeral indicates e heavy been as beam 1.1 and may he supported at its encls from the side wall of the arch. Mounted to slide on the lower flanges oi. the beam :28 are shelf-supportingbrackets 29 that support shelf-forming plates 30 having engular 4c stems 31, which, as shown, are mounted to slide into and out of angular seats formed in the respective hangers 29.

Ari epron Well 32 is built on the beam 28 end. shelf ,orming plates 30 and is thus supported iiitiepenciently of the arch. The space between the lower course of the apron min-3' and the uppermost block 23 of the curved, or hu ose-forming portion of the arch wil'i be filled in by fire bricks 33. Then the lire bricks 33 are removed, the apron Well. will remain in position.

By again clirecting attention to Figs. 1, 2, 3 and "i, it will he noted that the block. lumgers ii) are very much more narrow than the erchatorming blocks, measured in a (lirecticu longitudinally of the supporting beams Kai--16, and that they will freely throufih the clearance passages 27' oi 'soid liloe-l lien e, follows that when a block L9 is moved into alignment with the more p2is= gee L? of a particular block,

block e-iil or he forced downward of its poi the arch, and 1t also ow that i )i' may be replaced a reverse rqmrauion, When a block shown an. Lheam, that extends above they woe-mess hanger 19 is slid on the ileum so as to position its outstanding ears 2i within the seats 25 and under the ledges 26, the block will henger into an adjacent block.

In'Figs. 7 and E}, emorliiieil form of block hanger is illustrated and. in this mmllliml arrangement, the yoke-like portion 19" of such block hanger, instead of having the outstanding ears 21, is provided with :i con trally depending stem 19" that lcrminzil'cs in o, T-shaped heed 19 at its lower and. This heed 19 is adapted to be. inserted. into the block through the clearance passages 27 thereof and seated under the ledges 2e sul stentielly by the some manipulations that are described in connection with the block hanger 19. Both forms of block hunger support' the blocks directly under the supportiug beams 15-.16, and this, oi: course, gives the best kind of protection to the beams. in

Figs. 2 and 7, the numeral indicates fire clay pieced in the flaring joints between the upper portions of the arch-forming lElOljlx'b'.

Fig. Hl'iliustretes o, modified form of block hanger having substantially the outline of the hanger shown in detailin Fig. i, but in which the bar or body portion 19, which corresponds to the portion 19 of the hangers of Fig. 4:,is meals in two sections and the two sections are cleteehobly connected by a removable pin 19*. This hanger is provided with the inwardly projecting lugs, as in Fig. 4, and with the same kind of outstanding ears 21. The important advantage of this sectional or two-part hanger is-thet o damaged hanger can be removed from. the beam and a new hanger substituted therefor without disturbing the adjacent blocks or block hangers. made up of two hook-like sections, which. when connected, embrace the flange of the supporting been: and are slirleble 'thereon and, when disconnected, may be readily cletached from the beam flange.

Who's I claim is:

1. In e furnace ere-h, laterally spaced beams, block hangers each slidefble on e Obviously, "thehlovk hanger is single beam, and. erch-formin blOCkS'UZlClBI'- mosses clearance passages adapting them to be detached from and interlocked with said hangers without sliding said hangers out of the space normally occupied by said blocks, said arch-forming blocks being hung in a single layer underlying said beams and With their longitudinal joints spaced between beams.

3. In a furnace arch, laterally spaced beams, block hangers each slidable on a single beam, and arch-forming blocks underlying said beams and detachablyinterlocked to said hangers, said blocks having vertical clearance passages adapting them to be detached from and interlocked with said hangers without sliding said hangers out of the space normally occupied by said blocks, said beams having upwardly curved ends and the blocks applied thereto being Wedge-shaped and afl ording a radial structure at the inner end of the arch.

4. The structure defined in claim 3 in which said beams are provided with detachable beam tips on which the upwardly curved ends thereofare formed.

5. The structure defined in claim 3 in fur ther combination with an apron wall supported independently of said arch, and filler blocks interposed between said arch and the upper of said Wedge-shaped blocks and extending from the outer substantially to the inner portions thereof.

6. In a fire arch, laterally spaced beams, block hangers slidably on said beams, and arch-forming blocks underlying said beams and detachably interlocked to said hangers, said block hangers being in the form of fiat metal loops with inturned upper ends for engagement with the beam flanges and having outwardlyprojecting lips, said blocks in their tops having undercut ledges and vertical clearance passages for co-operation with the outstanding lips of said block hangers, said undercut ledges serving to support the blocks on said lips and said clearance passages permitting the blocks to be dropped from position.

In testimony whereof I atlix my signature.

' CLARENCE A. STRACHOTA. 

